Helsinki, Finland - 9 June 2017: Yakovlev Yak-11 Soviet training aircraft flying upside down at the Kaivopuisto Air Show. This airplane was used by the Soviet Union and its Warsaw Pact allies from 1947 until 1962. It was also sold to many African and Asian countries by the Soviet Union.

Stock photo: Helsinki, Finland - 9 June 2017: Yakovlev Yak-11 Soviet training aircraft flying upside down at the Kaivopuisto Air Show. This airplane was used by the Soviet Union and its Warsaw Pact allies from 1947 until 1962. It was also sold to many African and Asian countries by the Soviet Union. was taken by jekurantodistaja .